Rifling of gun-barrels.



No.650,4 6l. Patented May 29, I900.

W. HAWS.

RIFLING 0F GUN BARRELS.

(Application filed Nov. 15, 1899.) (No Model.)

Unitas Sterne PATENT @rrrns.

WILLIAM IlAWS, or muses, IDAHO, assrenon or ONE-THIRD TO JOHN TERRY, or SAME PLACE.

RiFLlNG OF GUN-BARRELS.

SPECIFICATION forming part of Letters Patent No. 650,46}, dated May 29, 1900.

Application filed November 1 5, 1899. Serial No- 737,111. (No model.)

To all lb'iLO'lTb it 11mg concern-.-

Be it known that I, WILLIAM HAWS, a citizen of the United States, residing at Driggs, in the county of Fremont and State of Idaho, have invent-ed certain new and useful improvements in Gun-Barrels; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in'the art to which it appertains to make and use the same.

This invention relates to gun-barrels generally, and more particularly to the bore thereof.

My object is to dispense with the rifling commonly employed in the bore and to provide a bore of improved form wherebytlie wear caused by the friction of the bullet will I be more evenly distributed than with the old form of riding, resulting in the longer life of the-barrel.-

The invention is also designed to give great acouraoyand to permit much longer contin ued use of the gun without necessitating cleaning than with the ordinary form of rifling.

. Having the foregoing objects in view, the invention consists in a gun-barrel having a bore of the novel construction set forth in detail hereinafter and recited in the appended claims. I

In the accompanying drawings, Figure 1 is an elevation of a rifle, partly in section, provided with my improved bore; Fig. 2, a crosssection of the barrel, and Fig. 3 a similar view showing a modification.

A gun-barrel having iny improved bore is shown at 1. The bore 2 has the outline of a polygon viewed cross-sectionally, and in the present instance it is of triangular shape, this being the preferred form. The sides 3 of the bore are perfectly straight; but the angles, instead of being sharp, are rounded at 4, which I have found in practice to be the form best adapted to give the most satisfactory results, because the lead of the bullet will then have less tendency to clog or fill the angles of the bore.

in Fig. 3 I have shown a eross-section of a barrel where one of the sides 5 is straight, as in Fig. i, and a second side 6 is convex, while This form will i.l.-'- third ide '7 is concave.

in practice give practically the same results as the form shown in Fig. 2. The bore is, as before, built on a twist or spiral, and the corners 4 are rounded. I do not therefore confine myself to a bore of polygonal shape with any or all of its-sides straight, and in the claims the terms triangular and polygonal are intended to include forms having either straight sides or curved sides, or a combination of both.

The bore is given a twist orspiral form, considered in the direction of its length, so that all the advantages of r iiiing,without any of its incident disadvantages, are obtained. When the bullet is discharged into the bore, it adapts itself to the straight sides and rounded angles thereof and cannot jump or slip, and by reason of the twist it is given the proper rotation to insure great accuracy and penetration. The'rou nded corners prevent clogging, and the length of the sides causes an even distribution of the wear, which gives the bore an exceedingly-long .life and keeps it clean for a much greater period of time during continued use than is possible with the old form of rifiin g where the grooves rapidly fill up and become worn because of the great amount of friction they have to bear.

While the triangular form is best adapted to the purpose, itis obvious that other poly onal shapes could be employed, and I do not therefore .limit myself to such a form.

Having thus described my invention,what I claim as new, and desire to secure by Letters Patent, is-

1. A gun-barrel having a bore of triangular shape having one side straight, and the remaining sides convex and concave respectively.

2. A gun-bar el having a bore of triangular shape having one side straight, and thereinaining sides convex and concave, respectively, and having its anglcs rounded ormado arcshaped.

In testimony whereof I allix my signature in presence of two witnesses.

- WILLTAM llAWS.

\Vit-nesses:

A. M. CARTER, PHILIP GARDEN. 

